At this point, we know that Gregor dies at the end of "The Metamorphosis", but what would have happened if he didn't die? Could he have become human again?
There is a suggestion on page 89 that he could have. When Grete and her mother go into Gregor's room to remove his furniture, the mother suggests that they leave the furniture in place, so that they don't show that they are giving up all hope of his recovery. She went on to say that it would be best if the room stayed the same, "so that when Gregor returns to us ... he can for get what's happened in the meantime all the easier." This implies that she not only believes that Gregor will recover, but that she is certain of it, as pointed to in her using the word "when" instead of "if". Assuming that the same principle of everyone knowing what is happening without seeing evidence (what Mr. Mitchell refers to dream logic) is applicable here, then Frau Samsa's implication that Gregor's condition is temporary should be accurate.
This knowledge that Gregor could eventually become human again might have influenced the way that his family treated him. Instead of killing Gregor immediately, his family cared for him. Grete gave him food in a buffet to see what he liked, because she knew that he would eventually become human again. Only after they got tired and more resentful of his inability to work did they begin to treat him badly. Only then did his father embed an apple in his back, and only then did Grete deny that it was Gregor, and effectively drive him back into his room to die. They were simply fed up with him being an insect, and they were no longer willing to wait for him to recover.
